In any case, the total number of carrots sold by merchants is equal to 3000 MINUS the carrots that camels need to eat. After selling 3000 carrots, the businessman still wants to go back, doesn't he? It takes at least 3 times to sell 3,000 carrots, so the camel needs to eat 6 carrots, and finally only 3,000-6 = 2,994 carrots are left. If the topic is changed to eat every 1 km 1 carrot, the most carrots that businessmen can sell are not enough for camels. Of course, if the number of carrots eaten by camels is related to the load and the distance traveled, then the load is certain and the distance traveled is directly proportional to the carrots eaten;